Furthermore, the garbage of the cities and towns of this country is collected and reduced to the form of fertilizer ingredient, where it formerly was burned or otherwise destroyed.
Not only is all this done, but the former waste products of the cotton and tobacco industry are similarly reduced to a form of plant food to be mixed with other materials and returned to the soil.
Still further, besides gathering up the waste and otherwise barren products of the country, the industry has developed processes whereby the gases from gas and coke manufacture are collected and reduced to sulphate of ammonia in which form it constitutes one of the nitrogenous ingredients in fertilizers. This ammonia sulphate is used as an ingredient in fertilizers supplying nitrogen.
Of late years the industry has gone even further than this, in that a process has been discovered whereby the nitrogen of the air is harnessed, and the product reduced to such forms that it supplies available nitrogen for plant food.
In assembling and preparing these essential elements of plant food, the industry, as we have pointed out, not only prepares material to return to the soil to supply the elements which have been taken out of it, but it actually provides in deficient soils elements in which they may be deficient, and by so doing makes more productive lands which, on account of their balanced plant food, could not produce paying results before being treated.
The State of Georgia in 1911 spent over twenty million dollars for fertilizers, with the result that they raised more and better cotton than was ever raised in this State before. The State of Maine in the same year used 150,000 tons of fertilizers on their potato fields, with the result that their good potato growers produced from two to four hundred bushels of potatoes per acre. The total State productions exceed 25,000,000 bushels.
The fertilizer industry, we believe, occupies a most prominent part in the problem of producing sustenance for future generations and in conserving the vital resources of the world, inasmuch as it is making a close study of and doing a wonderful work in devising means whereby practically all of the former waste materials of this country may be reduced to available plant food and returned to the soil from which they were taken.
Summarizing, the fertilizer industry, as we have pointed out, is an important factor in the maintenance of the human race, of this and other continents, in that (1) it supplies plant food to balance up the plant food in the soil and to make up the deficiencies which have occurred as a result of continuous cropping; (2) assists in educating the farmers to conserve the fertility of their soils by employing scientific methods of farming; (3) it makes use of waste products of other industries which have formerly been destroyed, and returns them to the soil in the form of food for future crops.
The fertilizer industry, therefore, must be recognized as one of the greatest agencies of conservation of vital resources.